Partitioning schemes in multi-layer video coding

A method for encoding video data, the method comprising:

• generating a bitstream that comprises an encoded representation of the video data, the bitstream comprising a plurality of layers, wherein:
• Network Access Layer (NAL) units of the bitstream having different layer identifiers belong to different layers of the plurality of layers, and
• generating the bitstream comprises including, in the bitstream, a syntax element indicating a number of different partitioning schemes for an output layer set, wherein the number of different partitioning schemes for the output layer set is greater than 1 and, for each respective partitioning scheme of the partitioning schemes for the output layer set, the respective partitioning scheme is a respective set of disjoint partitions whose union forms the output layer set, each respective partition of the respective set of disjoint partitions containing one or more layers of the plurality of layers;
• and
• outputting the bitstream.

A device for encoding video data, the device comprising:

• means for generating a bitstream that comprises an encoded representation of the video data, the bitstream comprising a plurality of layers, wherein:
• Network Access Layer (NAL) units of the bitstream having different layer identifiers belong to different layers of the plurality of layers, and
• the means for generating the bitstream comprises means for including, in the bitstream, a syntax element indicating a number of different partitioning schemes for an output layer set, wherein the number of different partitioning schemes for the output layer set is greater than 1 and, for each respective partitioning scheme of the plurality of partitioning schemes for the output layer set, the respective partitioning scheme is a respective set of disjoint partitions whose union forms the output layer set, each respective partition of the respective set of disjoint partitions containing one or more layers;
• and
• means for outputting the bitstream.

A computer-readable storage medium having instructions stored thereon that, when executed, cause one or more processors of a device for encoding video data to:

• generate a bitstream that comprises an encoded representation of the video data, the bitstream comprising a plurality of layers, wherein:
• Network Access Layer (NAL) units of the bitstream having different layer identifiers belong to different layers of the plurality of layers, and
• as part of causing the one or more processors to generate the bitstream, the instructions, when executed, cause the one or more processors to include, in the bitstream, a syntax element indicating a number of different partitioning schemes for an output layer set, wherein the number of different partitioning schemes for the output layer set is greater than 1 and, for each respective partitioning scheme of the plurality of partitioning schemes for the output layer set, the respective partitioning scheme is a respective set of disjoint partitions whose union forms the output layer set, each respective partition of the respective set of disjoint partitions containing one or more layers;
• and
• output the bitstream.